Construction of ferroconcrete floors having a level undersurface.



4 H. HAUSS. CONSTRUCTION 0F FERROCONCRETE FLOORS HAVING A LEVEL UNDERSURFACE. APPLICATION FILED 1AN.18,1913.

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Inventur;

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HERMANN HAUSS, OF l/U'lWICI-I,` GERMANY.

CONSTRUCTION OF FERROCONOIRETE FLOORS HAVING A LEVEL UNDERSURFACE.

Specification of Letters Patent.

Patented lFeb.. 22, limiti.,

Application iIed January 18, 1913. Serial No. 742,802.

To all whom t may concern:

Be it known that I, HERMANN HAUss, engineer, a subject of the Emperor of Germany, resident of Munich, in the Kingdom of Bavaria, Grermany,y (whose post-office address is Neubau Deutsches Museum, Innere Ehrhardtbrcke,) have invented a certain new and useful Improvement in the Construction of Ferroconcrete Floors, Having a Level Undersurface, of which the following is a specification, referencecbeing had to the accompanying dra-wing', forming a part thereof, in which similar letters of reference indicate corresponding parts.

This invention relates to an improvement in the construction of ferro-concrete floors, having a level undersurface. The peculiar advantage of this construction above those hitherto in use consists in the fact that the hollow space or cavity formed by the beveled top surfaces of two adjoining hollow-bricks, in concrete floors, is bridged over by reinforcing rod members which are carried along down to and are finally anchored in the armored cross-ribs which are lodged between each pair of bricks. By these means each pair of bricks is firmly clamped together. For the purpose of supporting the layer of concrete, which is to be introduced above the said cavity, a Rabitz wire-netting is made use of. This form of floors is much more advantageous than such by means of slabs. For the slabs have to be finished some weeks before they are used in the building, and are unable to form, in conjunction with the concrete added to them during the build ing-even provided the work were to be eXecuted most carefully-a monolithic floor compression-girder, as is possible by means Nets furthermore offer the possibility of augmenting the statical depth of the work without necessitating any increase in the quantity of concrete required, and without altering in any way the shape and size of the bricks employed. For all that is required in order to increase the depth of the floor is to surmount the row of hollow bricks by a layer of common bricks and then to tie the netvacross.

An embodiment of this improved construction is illustrated, by way of example, in the accompanying drawing, wherein a crosssection of the same is shown.

rlhe lateral surfaces -bof the hollowbricks -a-, required for the construction of the floor, are provided with such an incline as to cause, in a manner well known, the formation of wedge-like spaces -c-, broadening out toward the bottom, between the said hollow-bricks.

The casing is limited to a supporting of the hollow-bricks along the gaps at the joints. By concreting the spaces -c-, which are created between the higher of the lateral surfaces of the hollow-bricks, crossribs are formed, to the reinforcing means -cZ- of which, the reinforcing rod members -e-, which are intended to form a bridge across the hollow space existing between each adjoining pair of hollow-bricks, are anchored. To the reinforcing rod members -e-- a wire netting -fof the Rabitz type of construction or the like, is attached, which bridges the hollow space or cavity eX isting between two adjoining bricks, and serves as a support for the layer of concrete -g. In consequence of the fact that each pair of adjacent bricks is clamped together by the reinforcing rod members -e-, the floor is caused to form a solid massive body, the supporting capacity of which is considerably greater than that of the hollowbrick floors hitherto in use.

The structure of my invention is such that a plane inner surface (a ceiling surface in case of a floor structure) is provided without wire or other lath and at the same time the wall or floor is hollow including relatively large air spaces. Furthermore, the main concrete structure is independent of the bricks when it is set and no injury to, or removal of the bricks can adversely affect the main structure. However, the bricks have the useful function of serving as molds as above indicated while the concrete is bef ing cast, and as a means for providing an inner surface after the concrete is set. The auxiliary beams between the "bricks of the pairs serve to hold the bricks in place and yet permit of the ready removal of the bricks if it is desired to have the main arched structure alone. The majority of the bricks in this case can be removed without breaking, and used again.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A concrete structure comprising bricks, constituting molds for main and auxiliary parallel beams arranged in alternation, said bricks being formed with plane surfaces and arranged to provide a continuous plane inner surface for the structure. a reinforcement stretched between the main beams and materially spaced from the auxiliary beams. .and a masonry slab supported by the reinforcement, spaced from and independent of the auxiliary beams. and integrally connecting the main beams.

2. A concrete structure comprising a plurality of arch supporting bricks arranged in pairs in each arch and having sloping surfaces to provide a relatively large central cavity. a reinforcement bridging the cavity. and a masonry structure having spaced masonry beams between bricks of adjacent pairs connected by arches embodying said reinforcement, and masonry key beams between the bricks of the pairs independent of and spaced from the arches.

2%. A floor comprising a series of bricks suitably supported and arranged in pairs, the bricks of each pair having oppositely ar anged inclined upper surfaces to form a cavity between them, and plane bottom surfaces to form a plane horizontal ceiling surface and the bricks of adjacent pairs being spaced apart to form a cavity between them, concrete above the pairs of bricks and between bricks of adjacent pairs to constitute main beams and 'connecting arches. and concrete between the bricks of the pairs spaced from, the connecting arches above the pairs of bricks constituting intiependent key beams.

4. A floor comprising a series of bricks suitably supported and arranged in pairs. the bricks of each pair having oppositely arranged and inclined upper surfaces to form a cavity between them. and plane bottom surfaces to form a plane horizontal ceiling surface and the bricks of adjacent pairs being spaced apart to form a pocket between them. concrete above the pairs of bricks and between bricks ofv adjacent pairs to constitute main beams and connecting arches. and concrete between the bricks of the pairs constituting independent key beams; and reinforcing means bridging the aforesaid cavity in the concrete above the pairs of bricks and anchored in the main concrete beams.

A floor. comprising a series of hollow bricks suitably supported and arranged in pairs. with the bricks of adjacent pairs spaced apart. the bricks of each pair havingl oppositely arranged inclined upper faces to form a cavit)1 between them, and having downwardly inclined en'd surfaces. whereby to form a dovetail cavity between the bricks of adjacent pairs. concrete above the pairs of bricks and between the bricks of adjacent pairs. reinforcing rods bridging the cavity between the bricks of a pair and extending down the ends of the same and anchored in the concrete between the ends of adjacent pairs of bricks. and wire netting secured to the reinforcing rods and sustaining the concrete bridging the cavity between the pairs of bricks.

In testimony whereof I have signed name to the foregoing specification in presence of two subscribing witnesses.

HERMANN HAUss.

RICHARD LEMP.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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